Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean
This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay. Hydrolo...
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Online Access: | https://hdl.handle.net/11250/3103505 https://doi.org/10.1038/s41598-023-30653-5 |
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ftimr:oai:imr.brage.unit.no:11250/3103505 2023-12-17T10:46:40+01:00 Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean García-Seoane, Eva Klevjer, Thor A. Mork, Kjell Arne Agersted, Mette Dalgaard Macaulay, Gavin Melle, Webjørn Raunsgård 2023 application/pdf https://hdl.handle.net/11250/3103505 https://doi.org/10.1038/s41598-023-30653-5 eng eng Norges forskningsråd: 280546 EC/H2020/817669 Scientific Reports. 2023, 13 (1), . urn:issn:2045-2322 https://hdl.handle.net/11250/3103505 https://doi.org/10.1038/s41598-023-30653-5 cristin:2146499 16 13 Scientific Reports 1 Peer reviewed Journal article 2023 ftimr https://doi.org/10.1038/s41598-023-30653-5 2023-11-22T23:47:45Z This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay. Hydrological data were obtained at 20 conductivity-temperature-depth sensor (CTD) stations. To estimate the micronekton densities in front of the trawl, an autonomous echo sounder (120 or 200 kHz) on the headrope of the macroplankton trawl was used. Acoustic data were also collected along the cruise track using ship-mounted multi-frequency echo sounders (backscatter at 18 and 38 kHz was analyzed). Acoustic observations (both at 18, 38 and 120/200 kHz) showed clear patterns in the horizontal distribution of the micronekton during daytime with higher backscatter and echo densities in the south of the study area (from 17 to 37° N), and the absence of high backscatter in the surface from 37 to 45° N. Backscatter and echo densities were found to be significantly influenced by: temperature, salinity, and oxygen, as well as depth and time of the day. publishedVersion Article in Journal/Newspaper North Atlantic Northeast Atlantic Institute for Marine Research: Brage IMR Scientific Reports 13 1 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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English |
description |
This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins Haakon” was conducted during May 2019 from Cape Verde to Bay of Biscay. Hydrological data were obtained at 20 conductivity-temperature-depth sensor (CTD) stations. To estimate the micronekton densities in front of the trawl, an autonomous echo sounder (120 or 200 kHz) on the headrope of the macroplankton trawl was used. Acoustic data were also collected along the cruise track using ship-mounted multi-frequency echo sounders (backscatter at 18 and 38 kHz was analyzed). Acoustic observations (both at 18, 38 and 120/200 kHz) showed clear patterns in the horizontal distribution of the micronekton during daytime with higher backscatter and echo densities in the south of the study area (from 17 to 37° N), and the absence of high backscatter in the surface from 37 to 45° N. Backscatter and echo densities were found to be significantly influenced by: temperature, salinity, and oxygen, as well as depth and time of the day. publishedVersion |
format |
Article in Journal/Newspaper |
author |
García-Seoane, Eva Klevjer, Thor A. Mork, Kjell Arne Agersted, Mette Dalgaard Macaulay, Gavin Melle, Webjørn Raunsgård |
spellingShingle |
García-Seoane, Eva Klevjer, Thor A. Mork, Kjell Arne Agersted, Mette Dalgaard Macaulay, Gavin Melle, Webjørn Raunsgård Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
author_facet |
García-Seoane, Eva Klevjer, Thor A. Mork, Kjell Arne Agersted, Mette Dalgaard Macaulay, Gavin Melle, Webjørn Raunsgård |
author_sort |
García-Seoane, Eva |
title |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_short |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_full |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_fullStr |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_full_unstemmed |
Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean |
title_sort |
acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° n latitudes in the north atlantic ocean |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3103505 https://doi.org/10.1038/s41598-023-30653-5 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
16 13 Scientific Reports 1 |
op_relation |
Norges forskningsråd: 280546 EC/H2020/817669 Scientific Reports. 2023, 13 (1), . urn:issn:2045-2322 https://hdl.handle.net/11250/3103505 https://doi.org/10.1038/s41598-023-30653-5 cristin:2146499 |
op_doi |
https://doi.org/10.1038/s41598-023-30653-5 |
container_title |
Scientific Reports |
container_volume |
13 |
container_issue |
1 |
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1785570239818235904 |